@charset 'utf-8';

*{
    margin: 0;
    padding: 0;
}

.son{
    width: 50%;
    height: 100px;
    float: left;
}

.son1{
    background: skyblue;
}

.son2{
    background: pink;
}

.son3{
    background: yellowgreen;
}

.son4{
    background: orange;
}





@media screen and (min-width:1200px){
    .son{
        width: 25%;
    }
    
}